I think i know this is true but can someone confirm.

When you put a tuning chip on a diesel engine it basically just injects more diesel to the engine.

And would it also be correct that this will not harm a diesel as they do not need specific AFR like a petrol.

 

bttt

 

Not at all no.
Modern diesel engines are quite tricky to tune really as they have a plethora of interesting features that require a tweak or two.

More diesel is injected, yes, and its because in a TDi the energy is extracted largely from the derv as opposed to the fuel / air mix in a petrol engine. Adding more fuel to a petrol engine will drop power whilst adding air will normally improve it, a TDi works the other way. Boost is only really used to limit the smoke generated by such derv rich burn cycles.

The fuel injection itself is not the only fuel delivery item tweaked though as timing and of course injector line pressure is often adjusted too.

The fuel is only part of the story though as most diesels have gear dependant torque limiters and other exciting things built into them to keep power at set levels, thats one of the reasons they are so damn good out of teh box with surprising levels of grip for teh power in lower gears. We have to raise them to make them even better (At least in the dry. LOL).

Problems to beware of.

Excess fuelling can create dangerous EGT's

Excess fuelling can clog particulate filters in the exhuast.

 

Cheers stu, was looking at these tuning boxes as they seem fairly cheap for the company van just amazed some claim to take a 90bhp tdci to 120bhp from just increasing fueling cheers

 

Its true mate. Not even close to as refined as a proper remap, but if its cheap and has to eb removable its normally a good bet.

 

I'll be getting a vw transporter for work soon,if it were my own it would be straight to uncle stu's,but i don't want a re-map that i can't take with me,if you know what i mean,so are these boxes the only option,as there are loads about for the vw diesels.
Which are the best tuning boxes to buy?
I had a tuning box that was wired into the common rail sensor on my old vivaro,and it made a nice difference,but my boss was always whinging that my van used more fuel than everyone elses!

 

Stu what hardware and software do you use for tuning modern diesels/turbo ds? My dad has an alfa 2.4jtd and wants to know what to buy to remap it. PM if you prefer, Cheers

 

We have Ł30K worth of emulation gear and all the hardware to access the ecu to change teh maps on cars that cant be emulated. Surely he doesnt want to map it live himself as a one off Job? Why not just pay me Ł325 to do it instead?

 

Stu off topic but why do you always spell (THE)--- TEH always wanted to know...

 

It infuriates me mate, for some reason when i am typing the word my fingers almost always mix teh damn things up!!

I may add it to teh spell checker so its automaticaly fixed.

 

He maps cars for a living but has never done diesels, since he's got a diesel himself now he want's to make it faster lol! Is it a small minority of cars that cannot be emulated? What gear do you use to map the majority or cars?

 

Ah, ok, in that case he wants to buy something like Winols or Race 2000 pro and an emulator that can emulate a 44pin 29F400

yes, some cars cant be emulated, such as the latest EDC 16 and 17 systems. They are best flashed via teh serial port where possible.

 

For Ł325,do i own my map,or if i change vehicles,will it have to be done again?
Just wondering,as if the transporter had a chip as per cossies etc.,you could remove it and sell it on,or put it in a new vehicle,but a re-map is non transferrable,is this correct?
The reason i ask it that in my job the vans do high mileages,and often get swapped about,so the price of driving a re-mapped van would be quite expensive over a year or so,and i wouldn't want the next guy to have my van to benefit from my outlay!

 

Modern maps are not transferrable as they are generally keyed to the ecu and chassis number.

 

O.k. then thanks for that.
It looks as though i will be buying said tuning box for my van,any recomendations?

 

 

rssteve sorry about stealing your thread btw

@ Stu - What are your views on this - http://cgi.ebay.co.uk/ws/eBayISAPI.d...2468&rd=1&rd=1

I've heard there just as good as the orignals, but they have just cloned the hardware/software.

 

Do you really wanna run your expensive engine with a map from a CD of 50,000 tuned files on eBay?

If the mapper was any good how are his files now on ebay coming fre with some hardware?

Hardware might be ok though. Who knows?

 

Would something like that enable you to copy a re-mapped ecu,i.e. the modified map,and install it on another vehicle?

 

No i wanna write my own maps but i need to know if that hardware/software will let me do it lol.

They are free because they have stolen them from someone else (I read on some tuning forum)

 

IF your injecting more diesel into it to get more power etc how come the fuel economy goes up ??? as i have gained around 5-6 MPG since having mine chipped by you stu ??

 

Because of the extra tourqe you have you don't have to rev it as much (I think)

 

bttt

 

stu a quick question, a few tuning companies are struggling with the tuning of the 335i here in the uk, but the saem companies are having noo trouble with the 335d?!

is the map such as DMS and CAA do for the 335d a crude map or quite a involved decent maP?


thanks

carl

 

I bet your 335d pulls well!

 

lol